89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
Okay, I looked again and there are two places, each with it's own counter, where DTC 18 is set. I added another entry in the xdf where you make the same 4C -> 01 change and hopefully this time the code will stay gone.
I can't really give any suggestions about the warm starting. I would imagine that any combination of imperfect injectors, injection pump, pump timing, batteries, starter, etc would progressively cause harder starting, and adding fuel and/or timing might help in some cases. I would think that it would be safe to add 10-20% fuel to that table in the temp ranges you are targeting and see what happens.
I will try to find some time in the near future to look at the code that deals with starting and work to expand the tables/scalars and documentation for them. Maybe then I can give some better suggestions, but keep in mind I'm not an experienced diesel tuner.
It isn't 0-4800 rpm. The column variable is L00B5 which I haven't had time yet to decipher the math behind, but I have started working on it. There are also the tables at 557A, 558C, 559E (labeled CAL_CRANK_SEP_TIME_2, CAL_CRANK_PILOT_PW, CAL_CRANK_SEP_TIME), along with the constants above them, only some of which are labeled. I have those tables added to my xdf but I am still working on understanding them. The hack is really more like a bunch of hints because I've already found things that are incorrect, along with a ton that are labeled but the code isn't properly commented.
I should be able to get another iteration of the xdf posted by tuesday with most of the startup stuff added and at least partially documented.
Here is a new version of the XDF. I have added most of the starting related tables but I still haven't figured out all of the math and probably won't until I get some time to datalog with an actual vehicle.
I have added some of the EGR stuff and most of the TCC unlock features. I still need to work on the TCC PWM settings along with lock/unlock delay times.
I also added the Pump Calibration Resistor Tables so you can copy from one to another to emulate changing the resistor.
I also added the Garage Shift Torque Reduction stuff which reduces torque output when you shift into gear from P/N above a configurable RPM or throttle position.
This is very accurate. Most cold start issues are due to injectors and pump wear. You can add pulse width and basic timing advance during cranking but you are just masking mechanical issues 99% of the time. Poor atomization from old injectors on these is usually the problem. And shoving more fuel in at 22:1 compression on a cold start doesn't fix it. If you have good parts and lowered compression, having to make changes is a different story.
89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
4L80e. Lowered the MPH vs APP under 50% throttle. With the manual pump conversion a lot of the APP levers are modded by welding parts of a manual throttle pedal to the APP lever. The problem I had and what I've read in many places is the manual pump doesn't accelerate as fast under 50% throttle as the electric pump. The the low throttle angle and lack of continued acceleration cause the shifts to stall or hang until you either lift the throttle or increase mph.
One of the big conversion write ups requires the use of piggy backing a separate TCM to correct this. The author even states he tried to burn chips to achieve proper shifting but never had any luck. I've burnt two chips just for the shift table and I'm happy with it. I suppose the only caveat would be the difference in the geometry of the modded APP levers, but mine is working great.
This was my parents truck and they've been living with it this way for years. Thank you again for the XDF, huge leap forward for the truck as far as driveability!
89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
Bookmarks